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DERIVATIVE INSTRUMENTS (TABLES)
9 Months Ended
Sep. 30, 2011
DERIVATIVE INSTRUMENTS [ABSTRACT] 
LOCATION AND AMOUNTS OF DERIVATIVE FAIR VALUES ON THE CONSOLIDATED BALANCE SHEET
                     
   September 30, 2011 December 31, 2010 
    Derivative Notional Amount  Asset Derivative Fair Value(1)  Liability Derivative Fair Value(1)  Derivative Notional Amount  Asset Derivative Fair Value(1)  Liability Derivative Fair Value(1) 
                     
 Fair value hedges              
                     
  Foreign exchange contracts$ 522,480 $ 8,512 $ - $ 612,845 $ - $ 13,748 
                     
 Derivatives not designated as hedges             
  Relating to investment portfolio:                  
  Foreign exchange contracts  279,910   10,590   338   154,990   2,182   746 
                     
  Relating to underwriting portfolio:                  
  Currency collar options  15,312   351   -   -   -   - 
  Foreign exchange contracts$ 858,271   20,710   11,109 $ 110,564   4,459   492 
                     
  Total derivatives    $ 40,163 $ 11,447    $ 6,641 $ 14,986 
                     
(1) Asset and liability derivatives are classified within other assets and other liabilities on the Consolidated Balance Sheets.
NET EARNINGS IMPACT OF FAIR VALUE HEDGES
                
    Three months ended Nine months ended 
    September 30, September 30, 
    2011  2010  2011  2010 
               
  Foreign exchange contracts  $ 39,179 $ (66,760) $ (5,997) $ 25,463 
  Hedged investment portfolio    (43,920)   63,845   1,467   (20,861) 
 Hedge ineffectiveness recognized in earnings $ (4,741) $ (2,915) $ (4,530) $ 4,602 
                
TOTAL UNREALIZED AND REALIZED GAINS (LOSSES) ON DERIVATIVES NOT DESIGNATED AS HEDGES RECORDED IN EARNINGS
The total unrealized and realized gains (losses) recognized in earnings for derivatives not designated as hedges were as follows:
               
    Three months ended  Nine months ended 
  Location of Gain (Loss) Recognized  September 30,  September 30, 
  in Income on Derivative 2011  2010  2011  2010 
               
 Derivatives not designated as hedges            
  Relating to investment portfolio:            
  Foreign exchange contractsNet realized investment gains (losses)$ 18,825 $ (6,333) $ 5,364 $ (3,503) 
               
  Relating to underwriting portfolio:            
  Currency collar optionsForeign exchange gains (losses)  (2,975)   -   352   - 
  Foreign exchange contractsForeign exchange gains (losses)  (2,759)   (2,711)   18,842   4,705 
               
  Total $ 13,091 $ (9,044) $ 24,558 $ 1,202